Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 18, 21, ['S', '8063', 'W', '6979', 'k', 'M', 'V', '737', 'V', 'W', '7601', 'A', '6483', 'z', '8231', 'w', 'D', '525', 'I', '2525', 'n']

3050